(57) A method of calculating leg length discrepancy of a patient body including a first
side and a second side, the first side including a first portion of a pelvis, a first
femur, a first tibia, and a first foot region, the second side including a second
portion of the pelvis, a second femur, a second tibia, and a second foot region, the
method comprising: receiving patient bone data associated with the first and a second
sides of the patient body, one of the first or second sides including a degenerate
or deformed condition, the patient bone data having been generated by a medical imaging
device; generating a computer model of the first and second sides of the patient body
from the patient bone data; identifying anatomical landmarks in the patient bone data
or the computer model, the anatomical landmarks comprising: a first proximal point
and a first distal point on the first side; and a second proximal point and a second
distal point on the second side; orienting the first and second sides of the computer
model relative to each other in a coordinate system such that: a pelvic axis extending
through the first and second proximal points are generally perpendicular to a longitudinal
axis of the first and second sides of the computer model; and a first axis associated
with the first femur and a second axis associated with the second femur are generally
parallel to the longitudinal axis; calculating the leg length discrepancy based on
the first and second sides of the computer model after orienting the first and second
sides of the computer model relative to each other; and displaying at least one of
the leg length discrepancy or a portion of the computer model on a display screen.
|
|
